Technical Field
[0001] The present application relates to the field of communication, and more particularly,
to a method for transmitting a reference signal, a terminal, and a network device.
Background
[0002] A Demodulation Reference Signal (DMRS) is a reference signal that may be used in
uplink transmission and downlink transmission. In uplink transmission between a terminal
and a network device, a DRMS is usually associated with transmission of a Physical
Uplink Shared Channel (PUSCH) and a Physical Uplink Control Channel (PUCCH), and used
for estimating an uplink channel and performing coherent detection and demodulation
of the network device. In downlink transmission between a terminal and a network device,
a DMRS is called user equipment specific reference signal (UE-specific RS) and used
for demodulating data.
[0003] However, in an existing communication system, a location of a transmission resource
for transmitting a DMRS is fixed no matter in uplink transmission or in downlink transmission.
For example, in uplink transmission, a transmission resource for transmitting a DMRS
is configured in a middle of one time slot. The approach of transmitting a DMRS with
a fixed transmission resource is not flexible enough.
Summary
[0004] The present application provides a method for transmitting a reference signal, a
terminal and a network device to improve flexibility for transmitting a DMRS.
[0005] In a first aspect, there is provided a method for transmitting a reference signal.
The method includes: a terminal receives first information sent by a network device,
wherein the first information is used for indicating that a transmission pattern for
transmitting a demodulation reference signal (DMRS) to be transmitted is a first transmission
pattern or a second transmission pattern; and the terminal performs transmission of
the DMRS to be transmitted with the network device on a transmission resource indicated
by the first transmission pattern or the second transmission pattern.
[0006] First information indicates a transmission pattern of the DMRS to be transmitted,
thereby avoiding that a DMRS can be transmitted only on a fixed resource in the existing
art, and being beneficial to improving flexibility for transmitting the DMRS.
[0007] In combination with the first aspect, in some implementations, the first transmission
pattern is used for indicating that the DMRS to be transmitted contains an optional
reference signal, and the second transmission pattern is used for indicating that
the DMRS to be transmitted does not contain the optional reference signal.
[0008] Different transmission patterns (the first transmission pattern and second transmission
pattern) are used for indicating whether to transmit an optional reference signal,
and different transmission modes are configured to transmit a DMRS, to maintain a
balance of improving accuracy of channel estimation and saving overhead for transmitting
the DMRS.
[0009] In combination with the first aspect, in some implementations, a quantity of transmission
resources for transmitting the DMRS to be transmitted in a transmission unit indicated
by the first transmission pattern is greater than a quantity of transmission resources
used for transmitting the DMRS to be transmitted in a transmission unit indicated
by the second transmission pattern.
[0010] Different transmission patterns (the first transmission pattern and second transmission
pattern) are used for indicating whether to transmit an optional reference signal,
and different transmission modes are configured to transmit a DMRS, to maintain a
balance of improving accuracy of channel estimation and saving overhead for transmitting
the DMRS.
[0011] In combination with the first aspect, in some implementations, receiving, by the
terminal, the first information sent by the network device, includes: the terminal
receives the first information sent by the network device, wherein a first field in
the first information is used for indicating that the transmission pattern for transmitting
the DMRS to be transmitted is the first transmission pattern or the second transmission
pattern.
[0012] In combination with the first aspect, in some implementations, receiving, by the
terminal, the first information sent by the network device, includes: the terminal
receives the first information sent by the network device, wherein the first information
indicates whether the transmission pattern for transmitting the DMRS to be transmitted
is the first transmission pattern or the second transmission pattern through whether
carrying a second field or not.
[0013] Whether the transmission pattern for transmitting the DMRS to be transmitted is the
first transmission pattern or the second transmission pattern is indicated through
whether a second field is carried, thereby being beneficial to saving signaling overhead
caused by indicating the transmission pattern.
[0014] In combination with the first aspect, in some implementations, the first information
is at least one piece of following information: system information, a Radio Resource
Control (RRC) signaling, a Media Access Control (MAC) signaling, and Downlink Control
Information (DCI), and/or the first information is carried in a broadcast message
transmitted through a physical layer.
[0015] In combination with the first aspect, in some implementations, the DMRS to be transmitted
is used for demodulating a first channel, and the first channel is used for transmitting
at least one piece of following information: a paging message and indication information,
and the indication information is used for indicating contents of at least part of
system information.
[0016] In a second aspect, there is provided a method for transmitting a reference signal.
The method includes: a network device sends first information to a terminal, wherein
the first information is used for indicating that a transmission pattern for transmitting
a demodulation reference signal (DMRS) to be transmitted is a first transmission pattern
or a second transmission pattern; and the network device sends the DMRS to be transmitted
to the terminal on a transmission resource indicated by the first transmission pattern
or the second transmission pattern.
[0017] First information indicates a transmission pattern of the DMRS to be transmitted,
thereby avoiding that a DMRS can be transmitted only on a fixed resource in the existing
art, and being beneficial to improving flexibility for transmitting the DMRS.
[0018] In combination with the second aspect, in some implementations, the first transmission
pattern is used for indicating that the DMRS to be transmitted contains an optional
reference signal, and the second transmission pattern is used for indicating that
the DMRS to be transmitted does not contain the optional reference signal.
[0019] Different transmission patterns (the first transmission pattern and second transmission
pattern) are used for indicating whether to transmit an optional reference signal,
and different transmission modes are configured to transmit a DMRS, to maintain a
balance of improving accuracy of channel estimation and saving overhead for transmitting
the DMRS.
[0020] In combination with the second aspect, in some implementations, a quantity of transmission
resources for transmitting the DMRS to be transmitted in a transmission unit indicated
by the first transmission pattern is greater than a quantity of transmission resources
used for transmitting the DMRS to be transmitted in a transmission unit indicated
by the second transmission pattern.
[0021] In combination with the second aspect, in some implementations, sending, by the network
device, the first information to the terminal, includes: the network device sends
the first information to the terminal, wherein a first field in the first information
is used for indicating that the transmission pattern for transmitting the DMRS to
be transmitted is the first transmission pattern or the second transmission pattern.
[0022] In combination with the second aspect, in some implementations, sending, by the network
device, the first information to the terminal, includes: the network device sends
the first information to the terminal, wherein the first information indicates whether
the transmission pattern for transmitting the DMRS to be transmitted is the first
transmission pattern or the second transmission pattern through whether carrying a
second field or not.
[0023] Whether the transmission pattern for transmitting the DMRS to be transmitted is the
first transmission pattern or the second transmission pattern is indicated through
whether a second field is carried, thereby being beneficial to saving signaling overhead
caused by indicating the transmission pattern.
[0024] In combination with the second aspect, in some implementations, the method further
includes: the network device acquires communication state information of the terminal;
and the network device determines the transmission pattern for transmitting the DMRS
to be transmitted as the first transmission pattern or the second transmission pattern
according to the communication state information.
[0025] In combination with the second aspect, in some implementations, the first information
is any one piece of following information: system information, a Radio Resource Control
(RRC) signaling, a Media Access Control (MAC) signaling, and Downlink Control Information
(DCI), and/or the first information is carried in a broadcast message transmitted
through a physical layer.
[0026] In combination with the second aspect, in some implementations, the DMRS to be transmitted
is used for demodulating a first channel, and the first channel is used for transmitting
at least one piece of following information: a paging message and indication information,
and the indication information is used for indicating contents of at least part of
system information.
[0027] In a third aspect, there is provided a terminal including units for performing the
method in the first aspect.
[0028] In a fourth aspect, there is provided a network device including units for performing
the method in the second aspect.
[0029] In a fifth aspect, there is provided a terminal including a memory, a processor,
an input/output interface, and a communication interface. Herein, there are communication
connections among the memory, the processor, the input/output interface, and the communication
interface. The memory is used for storing instructions. The processor is used for
executing the instructions stored in the memory. When the instructions are executed,
the processor performs the method in the first aspect through the communication interface,
and controls the input/output interface to receive input data and information and
to output data such as an operation result.
[0030] In a sixth aspect, there is provided a network device including a memory, a processor,
an input/output interface, and a communication interface. Herein, there are communication
connections among the memory, the processor, the input/output interface, and the communication
interface. The memory is used for storing instructions. The processor is used for
executing the instructions stored in the memory. When the instructions are executed,
the processor performs the method in the second aspect through the communication interface,
and controls the input/output interface to receive input data and information and
to output data such as an operation result.
[0031] In a seventh aspect, a computer readable medium is provided. The computer readable
medium stores program codes for execution by a terminal device, and the program codes
include instructions for performing the method in the first aspect.
[0032] In an eighth aspect, a computer program product including instructions is provided.
When the instructions are executed on a computer, the computer program product causes
the computer to perform the methods described in the various aspects.
Brief Description of Drawings
[0033]
FIG. 1 shows a wireless communication system 100 applied in an embodiment of the present
application.
FIG. 2 is a schematic flowchart of a method for transmitting a reference signal according
to an embodiment of the present application.
FIG. 3 is a schematic flowchart of a method for transmitting a reference signal according
to another embodiment of the present application.
FIG. 4 is a schematic structural diagram of a terminal according to an embodiment
of the present application.
FIG. 5 is a schematic structural diagram of a network device according to an embodiment
of the present application.
FIG. 6 is a schematic block diagram of a terminal according to another embodiment
of the present application.
FIG. 7 is a schematic block diagram of a network device according to another embodiment
of the present application.
Detailed Description
[0034] Technical solutions in the present application will be described below with reference
to the accompanying drawings.
[0035] FIG. 1 shows a wireless communication system 100 applied in an embodiment of the
present application. The wireless communication system 100 may include a network device
110. The network device 110 may be a device that communicates with a terminal device.
The network device 100 may provide communication coverage for a specific geographical
area, and may communicate with terminal devices located within the coverage area.
[0036] FIG. 1 exemplifies one network device and two terminals. Optionally, the wireless
communication system 100 may include multiple network devices, and another quantity
of terminals may be included within a coverage area of each network device, which
is not limited in the embodiments of the present application.
[0037] Optionally, the wireless communication system 100 may also include another network
entitiy such as a network controller, a mobile management entity, and the embodiments
of the present application are not limited thereto.
[0038] It should be understood that the technical solutions of the present application may
be applied to various communication systems, such as a Global System of Mobile Communication
(GSM), a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple
Access (WCDMA) system, a General Packet Radio Service (GPRS) system, a Long Term Evolution
(LTE) system, an Advanced Long Term Evolution (LTE-A) system, a Universal Mobile Telecommunication
System (UMTS) system, a New Radio Access Technology (NR), and 5G.
[0039] In the embodiments of the present application, a terminal device may include, but
is not limited to, a Mobile Station (MS), a Mobile Terminal, a Mobile Telephone, a
User Equipment (UE), a handset, portable equipment, and so on. The terminal device
may communicate with one or more core networks via a radio access network (RAN). For
example, the terminal device may be a mobile phone (or called "cellular" phone) or
a computer with wireless communication function, or the like. The terminal device
may be a mobile apparatus that is portable, pocket-sized, hand-held, built in a computer,
or mounted on a vehicle.
[0040] In the embodiments of the present application, a network device may be an access
network device, such as a base station, a Transmit and Receive Point (TRP), or an
access point. The base station may be a Base Transceiver Station (BTS) in GSM or CDMA,
a NodeB in WCDMA, an evolved Node B (eNB or e-NodeB) in LTE, or a NR or 5G base station
(gNB), which is not limited in the embodiments of the present application.
[0041] In an existing communication system, a DMRS is transmitted on a fixed transmission
resource. For a terminal with high speed mobility, not only flexibility for transmitting
the DMRS is limited, but also an accuracy rate of a channel estimation result cannot
be improved. For a terminal moving at a high speed, as a moving speed of the terminal
increases, a velocity of channel change is also increasing. If the approach of transmitting
the DMRS on the fixed transmission resource is still used for performing real-time
channel estimation, an error of a channel estimation result will be larger and an
accuracy rate of the channel estimation will be reduced.
[0042] To solve the problems when a DMRS is transmitted in an existing communication system,
in a future communication system (e.g., 5G communication system), an optional reference
signal may be further transmitted based on a mode for transmitting a DMRS in an existing
communication system to improve an accuracy rate of channel estimation.
[0043] Therefore, in a future communication system, a mode for transmitting a DMRS may be
generally divided into the following two types.
[0044] Transmission Mode 1: Only a DMRS of a first type is transmitted. Generally, the DMRS
of the first type may effectively estimate a channel under a common scenario (e.g.,
a terminal located indoors or a terminal moving on a city road). When the DMRS of
the first type is transmitted, the DMRS may be transmitted according to the approach
of transmitting the DMRS in the existing communication system, i.e., the DMRS is transmitted
on a transmission resource of an OFDM symbol in the middle of one time domain transmission
unit (e.g., one time slot); or the DMRS may be transmitted in an OFDM symbol located
at the front of one time domain transmission unit (e.g., one time slot) (e.g., on
a first OFDM symbol in one time slot).
[0045] Transmission Mode 2: a DMRS of a first type and an optional reference signal are
transmitted. To improve an accuracy rate of channel estimation under a scenario of
a terminal moving at a high speed, on a basis of transmitting the DMRS of the first
type, the optional reference signal (i.e., optional reference signal) is simultaneously
transmitted, and the accuracy rate of channel estimation is improved through increasing
a density of transmitting reference signals in a time domain transmission unit. For
example, a transmission resource for transmitting the DMRS of the first type may be
located in a first OFDM symbol in one time domain transmission unit (e.g., one time
slot), and a transmission resource for transmitting the optional reference signal
may be located in a second OFDM symbol in the time domain transmission unit.
[0046] It should be noted that the optional reference signal may be referred to as an Additional
Reference Signal. The embodiments of the present application are not specifically
limited thereto.
[0047] Hereinafter, a method for transmitting a reference signal according to an embodiment
of the present application will be described in detail with reference to FIG. 2. FIG.
2 is a schematic flowchart of a method for transmitting a reference signal according
to an embodiment of the present application. The method shown in FIG. 2 includes the
following acts 210-220.
[0048] In act 210, a terminal receives first information sent by a network device, wherein
the first information is used for indicating that a transmission pattern for transmitting
a demodulation reference signal (DMRS) to be transmitted is a first transmission pattern
or a second transmission pattern.
[0049] Specifically, the optional reference signal may be understood as a reference signal
transmitted between the terminal and the network device, or may be a reference signal
not transmitted.
[0050] It should be noted that the optional reference signal may be a DMRS.
[0051] It should be noted that the first transmission pattern and the second transmission
pattern may be mutually independent transmission patterns. The first transmission
pattern and the second transmission pattern are applied to different scenarios respectively,
for example, the first transmission pattern may be applied to an application scenario
of the transmission mode 2, for example, a DMRS is transmitted between a terminal
with a high mobility and a network device, i.e., a scenario where it is difficult
to perform channel estimation. The second transmission pattern may be applied to an
application scenario of the transmission mode 1, for example, a terminal located indoors
or a terminal moving on a city road, i.e., a scenario where it is less difficult to
perform channel estimation.
[0052] Optionally, the first transmission pattern is used for indicating that the DMRS to
be transmitted contains an optional reference signal, and the second transmission
pattern is used for indicating that the DMRS to be transmitted does not contain the
optional reference signal.
[0053] Specifically, the first transmission pattern may be a transmission pattern into which
a transmission resource for transmitting an optional reference signal is added based
on the second transmission pattern, that is, the transmission resource for transmitting
the optional reference signal is added into the first transmission pattern based on
the second transmission pattern.
[0054] Different transmission patterns (the first transmission pattern and second transmission
pattern) are used for indicating whether to transmit an optional reference signal,
and different transmission modes are configured to transmit a DMRS, to maintain a
balance of improving accuracy of channel estimation and saving overhead for transmitting
the DMRS.
[0055] Optionally, a quantity of transmission resources for transmitting the DMRS to be
transmitted in a transmission unit indicated by the first transmission pattern is
greater than a quantity of transmission resources for transmitting the DMRS to be
transmitted in a transmission unit indicated by the second transmission pattern. Alternatively,
a density of transmission resources for transmitting the DMRS to be transmitted in
the transmission unit indicated by the first transmission pattern is greater than
a density of transmission resources for transmitting the DMRS to be transmitted in
the transmission unit indicated by the second transmission pattern.
[0056] Optionally, the network device may determine whether the transmission pattern for
transmitting the DMRS to be transmitted is the first transmission pattern or the second
transmission pattern according to communication state information of the terminal,
that is, the network device may determine whether the DMRS to be transmitted contains
an optional reference signal according to the communication state information of the
terminal.
[0057] Optionally, the communication state information may be information affecting quality
of communication between the terminal and the network device, for example, the communication
state information may be a moving speed of the terminal, location information of the
terminal, etc.
[0058] In act 220, the terminal performs transmission of the DMRS to be transmitted with
the network device on a transmission resource indicated by the first transmission
pattern or the second transmission pattern.
[0059] Specifically, the act 220 may include: the terminal sends the DMRS to be transmitted
to the network device on the transmission resource indicated by the first transmission
pattern or the second transmission pattern, that is, the DMRS to be transmitted is
a reference signal for uplink transmission.
[0060] The act 220 may further include: the terminal receives the DMRS to be transmitted
sent by the network device on the transmission resource indicated by the first transmission
pattern or the second transmission pattern, that is, the DMRS to be transmitted is
a reference signal for downlink transmission.
[0061] The first information indicates a transmission pattern of the DMRS to be transmitted,
thereby avoiding that the DMRS can be transmitted on only a fixed resource in the
existing art, and being beneficial to improving the flexibility for transmitting a
DMRS.
[0062] Optionally, as one embodiment, receiving, by the terminal, the first information
sent by the network device, includes: the terminal receives the first information
sent by the network device, wherein a first field in the first information is used
for indicating that the transmission pattern for transmitting the DMRS to be transmitted
is the first transmission pattern or the second transmission pattern.
[0063] Specifically, the first information may indicate that the transmission pattern for
transmitting the DMRS to be transmitted is the first transmission pattern or the second
transmission pattern through a value of the first field.
[0064] For example, the first field is 1 bit. When a value of the first field is 1, it may
be used for indicating that the transmission pattern for transmitting the DMRS to
be transmitted is the first transmission pattern. When the value of the first field
is 0, it may be used for indicating that the transmission pattern for transmitting
the DMRS to be transmitted is the second transmission pattern.
[0065] For another example, the first field is 1 bit. When a value of the first field is
0, it may be used for indicating that the transmission pattern for transmitting the
DMRS to be transmitted is the first transmission pattern. When the value of the first
field is 1, it may be used for indicating that the transmission pattern for transmitting
the DMRS to be transmitted is the second transmission pattern.
[0066] Optionally, as one embodiment, receiving, by the terminal, the first information
sent by the network device, includes: the terminal receives the first information
sent by the network device, wherein the first information indicates whether the transmission
pattern for transmitting the DMRS to be transmitted is the first transmission pattern
or the second transmission pattern through whether carrying a second field or not.
[0067] Specifically, the second field may be an optional field in the first information,
and the first information may indicate whether the transmission pattern for transmitting
the DMRS to be transmitted is the first transmission pattern or the second transmission
pattern through whether carrying the optional field.
[0068] For example, first information carrying the second field may be used for indicating
that the transmission pattern for transmitting the DMRS to be transmitted is the first
transmission pattern, and first information not carrying the second field may be used
for indicating that the transmission pattern for transmitting the DMRS to be transmitted
is the second transmission pattern.
[0069] For another example, first information not carrying the second field may be used
for indicating that the transmission pattern for transmitting the DMRS to be transmitted
is the first transmission pattern, and first information carrying the second field
may be used for indicating that the transmission pattern for transmitting the DMRS
to be transmitted is the second transmission pattern.
[0070] Optionally, as one embodiment, the first information is any one piece of following
information: system information, a Radio Resource Control (RRC) signaling, a Media
Access Control (MAC) signaling, and Downlink Control Information (DCI), and/or the
first information is carried in a broadcast message transmitted through a physical
layer.
[0071] It should be noted that when first information is system information, a transmission
pattern for transmitting a DMRS indicated by the first information may be used for
indicating a transmission pattern for transmitting a DMRS after the first information.
[0072] When first information is a RRC signaling, a MAC signaling, or DCI, a terminal needs
to access a network before starting up and registering, and then the terminal may
switch to an idle state to receive a paging message. Therefore, the information may
be used for indicating to transmit a transmission pattern used for a DMRS while transmitting
the paging message.
[0073] Optionally, the system information may be at least one piece of system information
necessary for a terminal to access a network (remaining minimum system information).
[0074] It should be understood that the first information may be information in a future
communication system having the same function as the system information, for example,
it may be information for accessing a cell: cell selection information, frequency
bandwidth indication, a system information modification tag, etc. Optionally, it may
be access restriction information: public radio resource configuration, frequency
information, a time length for controlling a terminal in uplink clock synchronization,
etc. Optionally, it may be reselection information of a public cell, etc. The embodiments
of the present application are not specifically limited thereto.
[0075] Optionally, as one embodiment, the DMRS to be transmitted is used for demodulating
a first channel, and the first channel is used for transmitting at least one piece
of: a paging message and indication information, and the indication information is
used for indicating contents of at least part of system information.
[0076] Specifically, the indication information is used for indicating contents of at least
part of the system information, that is, the indication information may be information
in a future communication system having the same function as the system information,
for example, information having the same function as a system information block 1
(SIB1) for assisting the terminal to access the network device.
[0077] FIG. 3 is a schematic flowchart of a method for transmitting a reference signal according
to another embodiment of the present application. The method shown in FIG. 3 includes
acts 310 and 320.
[0078] In act 310, a network device sends first information to a terminal, wherein the first
information is used for indicating that a transmission pattern for transmitting a
demodulation reference signal (DMRS) to be transmitted is a first transmission pattern
or a second transmission pattern.
[0079] In act 320, the network device sends the DMRS to be transmitted to the terminal on
a transmission resource indicated by the first transmission pattern or the second
transmission pattern.
[0080] Optionally, as one embodiment, the first transmission pattern is used for indicating
that the DMRS to be transmitted contains an optional reference signal, and the second
transmission pattern is used for indicating that the DMRS to be transmitted does not
contain the optional reference signal.
[0081] Optionally, as one embodiment, a quantity of transmission resources for transmitting
the DMRS to be transmitted in a transmission unit indicated by the first transmission
pattern is greater than a quantity of transmission resources used for transmitting
the DMRS to be transmitted in a transmission unit indicated by the second transmission
pattern.
[0082] Optionally, as one embodiment, sending, by the network device, the first information
to the terminal, includes: the network device sends the first information to the terminal,
wherein a first field in the first information is used for indicating that the transmission
pattern for transmitting the DMRS to be transmitted is the first transmission pattern
or the second transmission pattern.
[0083] Optionally, as one embodiment, sending, by the network device, the first information
to the terminal, includes: the network device sends the first information to the terminal,
wherein the first information indicates whether the transmission pattern for transmitting
the DMRS to be transmitted is the first transmission pattern or the second transmission
pattern through whether carrying a second field or not.
[0084] Optionally, as one embodiment, the method further includes: the network device acquires
communication state information of the terminal; and the network device determines
whether the DMRS to be transmitted contains the optional reference signal according
to the communication state information.
[0085] Optionally, as one embodiment, the DMRS to be transmitted is used for demodulating
a first channel, and the first channel is used for transmitting at least one piece
of following information: a paging message and indication information, and the indication
information is used for indicating contents of at least part of system information.
[0086] The methods for transmitting the reference signal of the embodiments in the present
application have been described in detail with reference to FIGs. 1 to 3. The apparatuses
of the embodiments in the present application will be described in detail below with
reference to FIGs. 4 to 7. It should be understood that the apparatuses shown in FIGs.
4 to 7 can realize the various acts in FIG. 2, and the various acts will not be described
in detail to avoid repetition.
[0087] FIG. 4 is a schematic structural diagram of a terminal according to an embodiment
of the present application. The terminal 400 shown in FIG. 4 includes a receiving
unit 410 and a transmission unit 420.
[0088] The receiving unit 410 is used for receiving first information sent by a network
device, wherein the first information is used for indicating that a transmission pattern
for transmitting a demodulation reference signal (DMRS) to be transmitted is a first
transmission pattern or a second transmission pattern.
[0089] The transmission unit 420 is used for performing transmission of the DMRS to be transmitted
with the network device on a transmission resource indicated by the first transmission
pattern or the second transmission pattern.
[0090] Optionally, as one embodiment, the first transmission pattern is used for indicating
that the DMRS to be transmitted contains an optional reference signal, and the second
transmission pattern is used for indicating that the DMRS to be transmitted does not
contain the optional reference signal.
[0091] Optionally, as one embodiment, a quantity of transmission resources for transmitting
the DMRS to be transmitted in a transmission unit indicated by the first transmission
pattern is greater than a quantity of transmission resources used for transmitting
the DMRS to be transmitted in a transmission unit indicated by the second transmission
pattern.
[0092] Optionally, as one embodiment, the receiving unit is specifically used for receiving
the first information sent by the network device, wherein a first field in the first
information is used for indicating that the transmission pattern for transmitting
the DMRS to be transmitted is the first transmission pattern or the second transmission
pattern.
[0093] Optionally, as one embodiment, the receiving unit is specifically used for receiving
the first information sent by the network device, wherein the first information indicates
whether the transmission pattern for transmitting the DMRS to be transmitted is the
first transmission pattern or the second transmission pattern through whether carrying
a second field or not.
[0094] Optionally, as one embodiment, the first information is any one piece of following
information: system information, a Radio Resource Control (RRC) signaling, a Media
Access Control (MAC) signaling, and Downlink Control Information (DCI), and/or the
first information is carried in a broadcast message transmitted through a physical
layer.
[0095] Optionally, as one embodiment, the DMRS to be transmitted is used for demodulating
a first channel, and the first channel is used for transmitting at least one piece
of following information: a paging message and indication information, and the indication
information is used for indicating contents of at least part of system information.
[0096] FIG. 5 is a schematic structural diagram of a network device according to an embodiment
of the present application. The network device 500 shown in FIG. 5 includes a sending
unit 510 and a transmission unit 520.
[0097] The sending unit 510 is used for sending first information to a terminal, wherein
the first information is used for indicating that a transmission pattern for transmitting
a demodulation reference signal (DMRS) to be transmitted is a first transmission pattern
or a second transmission pattern.
[0098] The transmission unit 520 is used for transmitting the DMRS to be transmitted to
the terminal on a transmission resource indicated by the first transmission pattern
or the second transmission pattern.
[0099] Optionally, as one embodiment, the first transmission pattern is used for indicating
that the DMRS to be transmitted contains an optional reference signal, and the second
transmission pattern is used for indicating that the DMRS to be transmitted does not
contain the optional reference signal.
[0100] Optionally, as one embodiment, a quantity of transmission resources for transmitting
the DMRS to be transmitted in a transmission unit indicated by the first transmission
pattern is greater than a quantity of transmission resources used for transmitting
the DMRS to be transmitted in a transmission unit indicated by the second transmission
pattern.
[0101] Optionally, as one embodiment, the sending unit is specifically used for sending
the first information to the terminal, wherein a first field in the first information
is used for indicating that the transmission pattern for transmitting the DMRS to
be transmitted is the first transmission pattern or the second transmission pattern.
[0102] Optionally, as one embodiment, the sending unit is specifically used for sending
the first information to the terminal, wherein the first information indicates whether
the transmission pattern for transmitting the DMRS to be transmitted is the first
transmission pattern or the second transmission pattern through whether carrying a
second field or not.
[0103] Optionally, as one embodiment, the network device further includes an acquisition
unit used for acquiring communication state information of the terminal; a determining
unit used for determining the transmission pattern for transmitting the DMRS to be
transmitted as the first transmission pattern or the second transmission pattern according
to the communication state information.
[0104] Optionally, as one embodiment, the first information is any one piece of following
information: system information, a Radio Resource Control (RRC) signaling, a Media
Access Control (MAC) signaling, and Downlink Control Information (DCI), and/or the
first information is carried in a broadcast message transmitted through a physical
layer.
[0105] Optionally, as one embodiment, the DMRS to be transmitted is used for demodulating
a first channel, and the first channel is used for transmitting at least one piece
of following information: a paging message and indication information, and the indication
information is used for indicating contents of at least part of system information.
[0106] FIG. 6 is a schematic block diagram of a terminal according to another embodiment
of the present application. The terminal 600 shown in FIG. 6 includes a memory 610,
a processor 620, an input/output interface 630, and a communication interface 640.
There are communication connections among the memory 610, the processor 620, the input/output
interface 630, and the communication interface 640. The memory 610 is used for storing
instructions. The processor 620 is used for executing the instructions stored in the
memory 610 to control the input/output interface 630 to receive input data and information,
to output data such as an operation result, and to control the communication interface
640 to send a signal.
[0107] The communication interface 640 is used for receiving first information sent by a
network device, wherein the first information is used for indicating that a transmission
pattern for transmitting a demodulation reference signal (DMRS) to be transmitted
is a first transmission pattern or a second transmission pattern.
[0108] The communication interface 640 is further used for performing transmission of the
DMRS to be transmitted with the network device on a transmission resource indicated
by the first transmission pattern or the second transmission pattern.
[0109] It should be understood that in the embodiment of the present invention, the processor
620 may adopt a general-purpose Central Processing Unit (CPU), a microprocessor, an
Application Specific Integrated Circuit (ASIC), or one or more integrated circuits
for executing related programs, to implement technical solutions provided by the embodiment
of the present invention.
[0110] It should also be understood that the communication interface 640 uses a transceiving
apparatus such as, but not limited to, a transceiver to realize communication between
the mobile terminal 600 and another device or a communication network.
[0111] The storage 610 may include a read-only memory and a random access memory, and provide
instructions and data to the processor 620. A part of the processor 620 may include
a non-volatile random access memory. For example, the processor 620 may store information
about device types.
[0112] In an implementing process, acts of the methods may be accomplished by integrated
logic circuits of hardware in the processor 620 or instructions in a form of software.
The method for transmitting the reference signal disclosed in combination with the
embodiments of the present invention may be embodied to be directly implemented by
a hardware processor, or by a combination of hardware and software modules in a processor.
The software modules may be located in a storage medium commonly used in the art,
such as a random access memory, a flash memory, a read-only memory, a programmable
read-only memory, or an electrically erasable programmable memory, or a register.
The storage medium is located in the memory 610, and the processor 620 reads information
in the memory 610 and accomplishes the acts of the methods in combination with its
hardware. In order to avoid repetition, it will not be described in detail here.
[0113] Optionally, as one embodiment, the first transmission pattern is used for indicating
that the DMRS to be transmitted contains an optional reference signal, and the second
transmission pattern is used for indicating that the DMRS to be transmitted does not
contain the optional reference signal.
[0114] Optionally, as one embodiment, a quantity of transmission resources for transmitting
the DMRS to be transmitted in a transmission unit indicated by the first transmission
pattern is greater than a quantity of transmission resources used for transmitting
the DMRS to be transmitted in a transmission unit indicated by the second transmission
pattern.
[0115] Optionally, as one embodiment, the communication interface is specifically used for
receiving the first information sent by the network device, wherein a first field
in the first information is used for indicating that the transmission pattern for
transmitting the DMRS to be transmitted is the first transmission pattern or the second
transmission pattern.
[0116] Optionally, as one embodiment, the communication interface is specifically used for
receiving the first information sent by the network device, wherein the first information
indicates whether the transmission pattern for transmitting the DMRS to be transmitted
is the first transmission pattern or the second transmission pattern through whether
carrying a second field or not.
[0117] Optionally, as one embodiment, the first information is any one piece of following
information: system information, a Radio Resource Control (RRC) signaling, a Media
Access Control (MAC) signaling, and Downlink Control Information (DCI), and/or the
first information is carried in a broadcast message transmitted through a physical
layer.
[0118] Optionally, as one embodiment, the DMRS to be transmitted is used for demodulating
a first channel, and the first channel is used for transmitting at least one piece
of following information: a paging message and indication information, and the indication
information is used for indicating contents of at least part of system information.
[0119] FIG. 7 is a schematic block diagram of a network device according to another embodiment
of the present application. The network device 700 shown in FIG. 7 includes a memory
710, a processor 720, an input/output interface 730, and a communication interface
740. There are communication connections among the memory 710, the processor 720,
the input/output interface 730, and the communication interface 740. The memory 710
is used for storing instructions. The processor 720 is used for executing the instructions
stored in the memory 710 to control the input/output interface 730 to receive input
data and information, to output data such as an operation results, and to control
the communication interface 740 to send a signal.
[0120] The communication interface 740 is used for sending first information to a terminal,
wherein the first information is used for indicating that a transmission pattern for
transmitting a demodulation reference signal (DMRS) to be transmitted is a first transmission
pattern or a second transmission pattern.
[0121] The communication interface 740 is further used for transmitting the DMRS to be transmitted
to the terminal on a transmission resource indicated by the first transmission pattern
or the second transmission pattern.
[0122] It should be understood that in the embodiment of the present invention, the processor
720 may adopt a general-purpose Central Processing Unit (CPU), a microprocessor, an
Application Specific Integrated Circuit (ASIC), or one or more integrated circuits
for executing related programs, to implement technical solutions provided by the embodiment
of the present invention.
[0123] It should also be understood that the communication interface 740 uses a transceiving
device such as, but not limited to, a transceiver to realize communication between
the mobile terminal 700 and another device or a communication network.
[0124] The storage 710 may include a read-only memory and a random access memory, and provide
instructions and data to the processor 720. A part of the processor 720 may include
a non-volatile random access memory. For example, the processor 720 may store information
about device types.
[0125] In an implementing process, acts of the methods may be accomplished by integrated
logic circuits of hardware in the processor 720 or instructions in a form of software.
The method for transmitting the reference signal disclosed in combination with the
embodiments of the present invention may be embodied to be directly implemented by
a hardware processor, or by a combination of hardware and software modules in a processor.
The software modules may be located in a storage medium commonly used in the art,
such as a random access memory, a flash memory, a read-only memory, a programmable
read-only memory, or an electrically erasable programmable memory, or a register.
The storage medium is located in the memory 710, and the processor 720 reads information
in the memory 710 and accomplishes the acts of the methods in combination with its
hardware. In order to avoid repetition, it will not be described in detail here.
[0126] Optionally, as one embodiment, the first transmission pattern is used for indicating
that the DMRS to be transmitted contains an optional reference signal, and the second
transmission pattern is used for indicating that the DMRS to be transmitted does not
contain the optional reference signal.
[0127] Optionally, as one embodiment, a quantity of transmission resources for transmitting
the DMRS to be transmitted in a transmission unit indicated by the first transmission
pattern is greater than a quantity of transmission resources used for transmitting
the DMRS to be transmitted in a transmission unit indicated by the second transmission
pattern.
[0128] Optionally, as one embodiment, the communication interface is specifically used for
sending the first information to the terminal, wherein a first field in the first
information is used for indicating that the transmission pattern for transmitting
the DMRS to be transmitted is the first transmission pattern or the second transmission
pattern.
[0129] Optionally, as one embodiment, the communication interface is specifically used for
sending the first information to the terminal, wherein the first information indicates
whether the transmission pattern for transmitting the DMRS to be transmitted is the
first transmission pattern or the second transmission pattern through whether carrying
a second field or not.
[0130] Optionally, as one embodiment, the input/output interface is used for acquiring communication
state information of the terminal; the processor is used for determining the transmission
pattern for transmitting the DMRS to be transmitted as the first transmission pattern
or the second transmission pattern according to the communication state information.
[0131] Optionally, as one embodiment, the first information is any one piece of following
information: system information, a Radio Resource Control (RRC) signaling, a Media
Access Control (MAC) signaling, and Downlink Control Information (DCI), and/or the
first information is carried in a broadcast message transmitted through a physical
layer.
[0132] Optionally, as one embodiment, the DMRS to be transmitted is used for demodulating
a first channel, and the first channel is used for transmitting at least one piece
of following information: a paging message and indication information, and the indication
information is used for indicating contents of at least part of system information.
[0133] It should be understood that in the embodiments of the present application, "B corresponding
to A" means that B is associated with A, and B may be determined according to A. However,
it should be further understood that determining B according to A does not mean B
is determined according to A only, but B may be determined according to A and/or other
information.
[0134] The term "and/or" in this document is merely an association relationship describing
associated objects, indicating that there may be three relationships, for example,
A and/or B may indicate three situations: A alone, A and B, and B alone. In addition,
the symbol "/" in this document generally indicates that objects before and after
the symbol "/" have an "or" relationship.
[0135] It should be understood that in various embodiments of the present application, sequence
numbers of the various processes do not imply an order of execution of the various
processes, which should be determined by their functions and internal logics, and
should not constitute any limitation on implementation processes of the embodiments
of the present application.
[0136] In several embodiments provided by the present application, it should be understood
that the disclosed systems, apparatuses and methods may be implemented in other ways.
The apparatus embodiments are only illustrative, for example, division of the units
is only a logical function division, and there may be other division manners in actual
realization. For example, multiple units or components may be combined or integrated
into another system, or some features may be ignored or not executed. On the other
hand, the mutual coupling or direct coupling or communication connection shown or
discussed may be indirect coupling or communication connection through some interfaces,
apparatuses or units, and may be in electrical, mechanical or other forms.
[0137] The units described as separated components may or may not be physically separated,
and the component shown as a unit may or may not be a physical unit, i.e., it may
be located in one place or may be allocated over multiple network units. Some or all
of the units may be selected according to practical needs to achieve a purpose of
the embodiments.
[0138] In addition, various functional units in various embodiments of the present application
may be integrated in one processing unit, or various units may be physically present
separately, or two or more units may be integrated in one unit.
[0139] The embodiments may be implemented in whole or in parts by software, hardware, firmware,
or any combination thereof. When the functions described in the embodiments of the
present application are implemented through software, these functions may be implemented
in whole or in parts in a form of a computer program product. The computer program
product includes one or more computer instructions. When the computer program instructions
are loaded and executed on a computer, the processes or functions are generated in
whole or in parts according to the embodiments of the present application. The computer
may be a general purpose computer, a special purpose computer, a computer network,
or another programmable apparatus. The computer instructions may be stored in a computer-readable
storage medium, or transmitted from one computer-readable storage medium to another
computer-readable storage medium, for example, the computer instructions may be transmitted
from a website site, a computer, a server, or a data center to another website site,
computer, server, or data center through a wired mode (e.g., a coaxial cable, an optical
fiber, a Digital Subscriber Line (DSL)) or a wireless mode (e.g., infrared radiation,
radio, microwave, etc.). The computer-readable storage medium may be any available
medium that the computer can read, or a data storage device such as an integrated
server or data center that includes one or more available media. The available medium
may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical
medium (e.g., a Digital Video Disc (DVD)), or a semiconductor medium (e.g., a Solid
State Disk (SSD)), or the like.
[0140] The foregoing are merely example embodiments of the present application, but the
protection scope of the present application is not limited thereto. Any person skilled
in the art may easily conceive variations or substitutions within the technical scope
disclosed by the present application, which should be included within the protection
scope of the present application. Therefore, the protection scope of the present application
shall be determined by the protection scope of the claims.
1. A method for transmitting a reference signal, comprising:
receiving, by a terminal, first information sent by a network device, wherein the
first information is used for indicating that a transmission pattern for transmitting
a demodulation reference signal (DMRS) to be transmitted is a first transmission pattern
or a second transmission pattern; and
performing, by the terminal, transmission of the DMRS to be transmitted with the network
device on a transmission resource indicated by the first transmission pattern or the
second transmission pattern.
2. The method according to claim 1, wherein the first transmission pattern is used for
indicating that the DMRS to be transmitted contains an optional reference signal,
and the second transmission pattern is used for indicating that the DMRS to be transmitted
does not contain the optional reference signal.
3. The method according to claim 1 or 2, wherein a quantity of transmission resources
used for transmitting the DMRS to be transmitted in a transmission unit indicated
by the first transmission pattern is greater than a quantity of transmission resources
used for transmitting the DMRS to be transmitted in a transmission unit indicated
by the second transmission pattern.
4. The method according to any one of claims 1-3, wherein receiving, by the terminal,
the first information sent by the network device comprises:
receiving, by the terminal, the first information sent by the network device, wherein
a first field in the first information is used for indicating that the transmission
pattern for transmitting the DMRS to be transmitted is the first transmission pattern
or the second transmission pattern.
5. The method according to any one of claims 1-3, wherein receiving, by the terminal,
the first information sent by the network device comprises:
receiving, by the terminal, the first information sent by the network device, wherein
the first information indicates whether the transmission pattern for transmitting
the DMRS to be transmitted is the first transmission pattern or the second transmission
pattern through whether carrying a second field or not.
6. The method according to any one of claims 1-5, wherein the first information is at
least one piece of following information: system information, a radio resource control
(RRC) signaling, a media access control (MAC) signaling, and downlink control information
(DCI), and/or
the first information is carried in a broadcast message transmitted through a physical
layer.
7. The method according to any one of claims 1-6, wherein the DMRS to be transmitted
is used for demodulating a first channel, and the first channel is used for transmitting
at least one of: a paging message and indication information, and the indication information
is used for indicating contents of at least part of system information.
8. A method for transmitting a reference signal, comprising:
sending, by a network device, first information to a terminal, wherein the first information
is used for indicating that a transmission pattern for transmitting a demodulation
reference signal (DMRS) to be transmitted is a first transmission pattern or a second
transmission pattern; and
sending, by the network device, the DMRS to be transmitted to the terminal on a transmission
resource indicated by the first transmission pattern or the second transmission pattern.
9. The method according to claim 8, wherein the first transmission pattern is used for
indicating that the DMRS to be transmitted contains an optional reference signal,
and the second transmission pattern is used for indicating that the DMRS to be transmitted
does not contain the optional reference signal.
10. The method according to claim 8 or 9, wherein a quantity of transmission resources
for transmitting the DMRS to be transmitted in a transmission unit indicated by the
first transmission pattern is greater than a quantity of transmission resources used
for transmitting the DMRS to be transmitted in a transmission unit indicated by the
second transmission pattern.
11. The method according to any one of claims 8-10, wherein sending, by the network device,
the first information to the terminal comprises:
sending, by the network device, the first information to the terminal, wherein a first
field in the first information is used for indicating that the transmission pattern
for transmitting the DMRS to be transmitted is the first transmission pattern or the
second transmission pattern.
12. The method according to any one of claims 8-10, wherein sending, by the network device,
the first information to the terminal comprises:
sending, by the network device, the first information to the terminal, wherein the
first information indicates whether the transmission pattern for transmitting the
DMRS to be transmitted is the first transmission pattern or the second transmission
pattern through whether carrying a second field or not.
13. The method according to any one of claims 8-12, wherein the method further comprises:
acquiring, by the network device, communication state information of the terminal;
and
determining, by the network device, the transmission pattern for transmitting the
DMRS to be transmitted as the first transmission pattern or the second transmission
pattern according to the communication state information.
14. The method according to any one of claims 8-13, wherein the first information is any
one piece of following information: system information, a radio resource control (RRC)
signaling, a media access control (MAC) signaling, and downlink control information
(DCI), and/or
the first information is carried in a broadcast message transmitted through a physical
layer.
15. The method according to any one of claims 8-14, wherein the DMRS to be transmitted
is used for demodulating a first channel, and the first channel is used for transmitting
at least one piece of following information: a paging message and indication information,
and the indication information is used for indicating contents of at least part of
system information.
16. A terminal, comprising:
a receiving unit, used for receiving first information sent by a network device, wherein
the first information is used for indicating that a transmission pattern for transmitting
a demodulation reference signal (DMRS) to be transmitted is a first transmission pattern
or a second transmission pattern; and
a transmission unit, used for performing transmission of the DMRS to be transmitted
with the network device on a transmission resource indicated by the first transmission
pattern or the second transmission pattern.
17. The terminal according to claim 16, wherein the first transmission pattern is used
for indicating that the DMRS to be transmitted contains an optional reference signal,
and the second transmission pattern is used for indicating that the DMRS to be transmitted
does not contain the optional reference signal.
18. The terminal according to claim 16 or 17, wherein a quantity of transmission resources
for transmitting the DMRS to be transmitted in a transmission unit indicated by the
first transmission pattern is greater than a quantity of transmission resources used
for transmitting the DMRS to be transmitted in a transmission unit indicated by the
second transmission pattern.
19. The terminal according to any one of claims 16-18, wherein the receiving unit is specifically
used for:
receiving the first information sent by the network device, wherein a first field
in the first information is used for indicating that the transmission pattern for
transmitting the DMRS to be transmitted is the first transmission pattern or the second
transmission pattern.
20. The terminal according to any one of claims 16-18, wherein the receiving unit is specifically
used for:
receiving the first information sent by the network device, wherein the first information
indicates whether the transmission pattern for transmitting the DMRS to be transmitted
is the first transmission pattern or the second transmission pattern through whether
carrying a second field or not.
21. The terminal according to any one of claims 16-20, wherein the first information is
any one piece of following information: system information, a radio resource control
(RRC) signaling, a media access control (MAC) signaling, and downlink control information
(DCI), and/or
the first information is carried in a broadcast message transmitted through a physical
layer.
22. The terminal according to any one of claims 16-21, wherein the DMRS to be transmitted
is used for demodulating a first channel, and the first channel is used for transmitting
at least one piece of following information: a paging message and indication information,
and the indication information is used for indicating contents of at least part of
system information.
23. A network device, comprising:
a sending unit, used for sending first information to a terminal, wherein the first
information is used for indicating that a transmission pattern for transmitting a
demodulation reference signal (DMRS) to be transmitted is a first transmission pattern
or a second transmission pattern; and
a transmission unit, used for transmitting the DMRS to be transmitted to the terminal
on a transmission resource indicated by the first transmission pattern or the second
transmission pattern.
24. The network device according to claim 23, wherein the first transmission pattern is
used for indicating that the DMRS to be transmitted contains an optional reference
signal, and the second transmission pattern is used for indicating that the DMRS to
be transmitted does not contain the optional reference signal.
25. The network device according to claim 23 or 24, wherein a quantity of transmission
resources for transmitting the DMRS to be transmitted in a transmission unit indicated
by the first transmission pattern is greater than a quantity of transmission resources
used for transmitting the DMRS to be transmitted in a transmission unit indicated
by the second transmission pattern.
26. The network device according to any one of claims 23-25, wherein the sending unit
is specifically used for:
sending the first information to the terminal, wherein a first field in the first
information is used for indicating that the transmission pattern for transmitting
the DMRS to be transmitted is the first transmission pattern or the second transmission
pattern.
27. The network device according to any one of claims 23-25, wherein the sending unit
is specifically used for:
sending the first information to the terminal, wherein the first information indicates
whether the transmission pattern for transmitting the DMRS to be transmitted is the
first transmission pattern or the second transmission pattern through whether carrying
a second field or not.
28. The network device according to any one of claims 23-27, wherein the network device
further comprises:
an acquisition unit, used for acquiring communication state information of the terminal;
and
a determining unit, used for determining the transmission pattern for transmitting
the DMRS to be transmitted as the first transmission pattern or the second transmission
pattern according to the communication state information.
29. The network device according to any one of claims 23-28, wherein the first information
is any one piece of following information: system information, a radio resource control
(RRC) signaling, a media access control (MAC) signaling, and downlink control information
(DCI), and/or
the first information is carried in a broadcast message transmitted through a physical
layer.
30. The network device according to any one of claims 23-29, wherein the DMRS to be transmitted
is used for demodulating a first channel, and the first channel is used for transmitting
at least one piece of following information: a paging message and indication information,
and the indication information is used for indicating contents of at least part of
system information.